2010年10月20日 星期三

TAKING A CLOSER LOOK AT PLAQUE

TAKING A CLOSER LOOK AT PLAQUE

A team of University of Rochester scientists is using the technique of Raman spectroscopy to study two common dental plaque bacteria, Streptococcus sanguis and mutans. The relative balance of the two may be an indicator of a patient's oral health and risk for tooth decay -- Streptococcus sanguis is associated with "healthy" plaque, while mutans is associated with tooth decay.And they should be balanced out throughout the space. Avoid living with only Book scanner one general light fixture, which is often fixed in the center of the room.

Raman spectroscopy offers the potential to analyze samples of the bacterium in a simple, rapid and quantitative manner as compared to microbiology techniques,Like this, you can set table lamps a mood or read a book or sew with great ease. Remember that lots of lighting sources are necessary within any room. including the ability to study spatial distributions of bacterial species, living or dead,Larger kitchens may require one or more ceiling fixtures positioned in the center of the room. Additional perimeter led tube squares or rectangles of lights placed near the walls should be installed for added illumination. These can be in the form of recessed downlight or track lighting. On the other hand, small kitchens may require only either two or three ceiling mounted fixtures or downlight placed near the walls. within samples.

"We're using Raman spectroscopy to study these oral bacterial biofilms, essentially observing how two species scatter light into shifted wavelengths in a unique way. We can then use these characteristic spectra to identify 'unknown' samples of these species," says Brooke Beier, a Ph.Every room stands to benefit from various light sources. This helps to create atmosphere. It also helps those who Insulator live there accomplished and complete tasks that require good light.D. candidate at the University of Rochester's Institute of Optics. "Studying the spatial distributions of the good vs. bad bacteria under various growth conditions may help scientists determine more effective treatments to prevent tooth decay."

With the ability to identify biofilm samples by species,The sink area can also benefit from recessed downlight or track lights using either fluorescent bulbs two 75-watt incandescent bulbs or two 30- watt fluorescent bulbs placed about 24 inches above the sink. the researchers can now move on to the study of biofilms grown from a mixture of liquid cultures, where the two species may interact as they grow together.

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